================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu write to 0xffff88813bd1dea0 of 8 bytes by interrupt on cpu 1: hrtimer_interrupt+0x1e2/0xa10 kernel/time/hrtimer.c:1637 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x6f/0x200 arch/x86/kernel/apic/apic.c:1102 asm_call_irq_on_stack+0xf/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0x52/0x90 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] kcsan_setup_watchpoint+0x1fc/0x4e0 kernel/kcsan/core.c:591 tomoyo_check_acl+0x9a/0x200 security/tomoyo/domain.c:173 tomoyo_path_number_perm+0x1af/0x2d0 security/tomoyo/file.c:733 tomoyo_path_chmod+0x23/0x30 security/tomoyo/tomoyo.c:342 security_path_chmod+0x92/0xe0 security/security.c:1153 chmod_common+0xe6/0x280 fs/open.c:578 vfs_fchmod fs/open.c:598 [inline] __do_sys_fchmod fs/open.c:607 [inline] __se_sys_fchmod fs/open.c:601 [inline] __x64_sys_fchmod+0xac/0xf0 fs/open.c:601 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88813bd1dea0 of 8 bytes by task 17559 on cpu 0: print_cpu+0x32e/0x690 kernel/time/timer_list.c:133 timer_list_show+0x114/0x180 kernel/time/timer_list.c:283 seq_read_iter+0x5f6/0x8e0 fs/seq_file.c:269 proc_reg_read_iter+0xfc/0x170 fs/proc/inode.c:310 call_read_iter include/linux/fs.h:1895 [inline] generic_file_splice_read+0x22a/0x310 fs/splice.c:311 do_splice_to fs/splice.c:788 [inline] splice_direct_to_actor+0x2aa/0x650 fs/splice.c:867 do_splice_direct+0xf5/0x170 fs/splice.c:976 do_sendfile+0x5db/0xca0 fs/read_write.c:1257 __do_sys_sendfile64 fs/read_write.c:1318 [inline] __se_sys_sendfile64 fs/read_write.c:1304 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1304 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 17559 Comm: syz-executor.3 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================